export function love () {
    (function (window, document) {
      var hearts = []
      window.requestAnimationFrame = (function () {
        return window.requestAnimationFrame ||
          window.webkitRequestAnimationFrame ||
          window.mozRequestAnimationFrame ||
          window.oRequestAnimationFrame ||
          window.msRequestAnimationFrame ||
          function (callback) {
            setTimeout(callback, 1000 / 60)
          }
      })()
      init()
      function init () {
        css(".heart{width: 10px;height: 10px;position: fixed;background: #f00;transform: rotate(45deg);-webkit-transform: rotate(45deg);-moz-transform: rotate(45deg);}.heart:after,.heart:before{content: '';width: inherit;height: inherit;background: inherit;border-radius: 50%;-webkit-border-radius: 50%;-moz-border-radius: 50%;position: absolute;}.heart:after{top: -5px;}.heart:before{left: -5px;}")
        attachEvent()
        gameloop()
      }
      function gameloop () {
        for (var i = 0; i < hearts.length; i++) {
          if (hearts[i].alpha <= 0) {
            document.body.removeChild(hearts[i].el)
            hearts.splice(i, 1)
            continue
          }
          hearts[i].y--
          hearts[i].scale += 0.004
          hearts[i].alpha -= 0.013
          hearts[i].el.style.cssText = 'left:' + hearts[i].x + 'px;top:' + hearts[i].y + 'px;opacity:' + hearts[i].alpha + ';transform:scale(' + hearts[i].scale + ',' + hearts[i].scale + ') rotate(45deg);background:' + hearts[i].color
        }
        requestAnimationFrame(gameloop)
      }
      function attachEvent () {
        var old = typeof window.onclick === 'function' && window.onclick
        window.onclick = function (event) {
          old && old()
          createHeart(event)
        }
      }
      function createHeart (event) {
        var d = document.createElement('div')
        d.className = 'heart'
        hearts.push({
          el: d,
          x: event.clientX - 5,
          y: event.clientY - 5,
          scale: 1,
          alpha: 1,
          color: randomColor()
        })
        document.body.appendChild(d)
      }
      function css (css) {
        var style = document.createElement('style')
        style.type = 'text/css'
        try {
          style.appendChild(document.createTextNode(css))
        } catch (ex) {
          style.styleSheet.cssText = css
        }
        document.getElementsByTagName('head')[0].appendChild(style)
      }
      function randomColor () {
        return 'rgb(' + (~~(Math.random() * 255)) + ',' + (~~(Math.random() * 255)) + ',' + (~~(Math.random() * 255)) + ')'
      }
    })(window, document)
  }
  
  